Adjustable gas or fluid check.



' Patented Feb; 190'2. H. c. nANFoRTH.

ADJUSTABLE GAS OR'FLUID CHECK.

(Application med June 1'0, 1901.;

(No nodal.)

nro/Mer.

UNITED STATES PATENT OFFICE.

HENRY C. DANFORTH, OF PHILADELPHIA, PENNSYLVANIA.

ADJUSTABLE GAS on FLUIQ CHECK.

SPECIFICATION forming part of Letters Patent N o. 693,116, dated February 11, 1902.

Application filed June 10, 1901. Serial No. 63,911. (No model.)

To all whom it may concern:

Be it known that I, HENRY C. DANFORTH, a citizen of the United States, residing at No. 148 North Tenth street, in the city and county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Adjustable Gas or Fluid Checks, of which the followingis a specification.

My invention relates to apparatus for controlling the rate of feed of gases or liquids; and my object is to provide what I term anv adjustable gas or fluid check, whereby the flow at this point of consumption or discharge may be simply and efticientlyadjusted and controlled. I attain this object by the mech- I anism illustrated in the 'accompanying drawings, in which- Figure l is a general View of the device, showing the arrangement of parts when the check is used for controllingthe flow of gas in a burner of the Bunsen or similar types. Fig. 2 is a view in vertical section, on an euy, larged scale, of the operative parts of the device. Fig. 3 is a horizontal section on the line 3 3, Fig. 2. In Fig. 1, A is a tube furnished near its base with a plurality of openings B and carrying the frame C. To the upper cylindrical portion of the frame C are attached the wire gauze or netting D and hood E.

In Fig. 2 the baseor lower end of the tube A, with the inclosed parts, is shown on an enlarged scale. IfVhat I term the low-feed check F is threaded or otherwise adj ustably .secured in the base of the tube A and provided With a conical or other suitably-shaped head, in the apex ot' which is the aperture G. Wha-t I term the high-feed check H is adjustably secured in a similar manner Within the low-feed check F. The head of the highfeed check II is furnished with the aperture J in the apex of said head, the shoulder I, and a plurality of openings K a little below the shoulder I. The base of the check H is adapted to be secured to the gas or liquid supply pipe. L is a collar designed to set or clamp the'low and high feed checks after adjustment.

The operation of my device is as follows: The arrangement of parts above described admits of increasing or decreasing the space between the heads of the checks F and II by turning the' check F and with it the tube A. If the checks F and H are so adjusted relatively to each other that a free annular passage is formed between the shoulder I and the inner wall of the check F, the gas or liquid entering the check H from the supplypipe finds ari-exit. into the check F through the openings K and .the aperture J. From the space between the checks F and H the gas or liquid, finds an exit through the aperture G in the head of the checkF. Thus in the relative position of parts above described it is clear that the maximum rate of discharge is regulatedby the size of the aperture G. If it is desired to decrease the rate of discharge, the check F islowered upon the check H, diminishing proportionately the annular v passage between the shoulder I and the inner surface of. the apex ofthe checkF. This tends more and more to cut off the supply through the openings K until when the shoulder I is brought into actual contact with the inner surface of the check F the ou tiiow through the openings K is cut ott' completely. The only exit from the check I-I is thenl through the aperture J, the size of`which determines the minimum required outflow. Thus it will be apparent that the size of the opening G governs the maximum flow, while that of the opening J, which is considerablysmaller, governs the minimum flow, the shoulder I regulating all intermediate rates of loW by the degree to which it is approached to or withdraws from the head of the outer check F.

I have here shown my adjustable check arranged for use in connection with a gasburner. The supply of gas through the. aperture G being regulated as above described, the necessary air for combustion is furnished through the openings B, the gas and aii bting'mixed as they ascend through the tube A to the point at which ignition takes place.

I have here shown and described the single openings G and .Iin the heads of the outer and inner checks; but Ido not wish to be understood as conining myself to thatnumber. There may be a.plurality of openings in the heads of both outer and inner checks, the

only requirement being that in that case the.

openings in the outer check shall be larger or more numerous than the correspondiugopenings in the inner check.

/Vhat I claim as rny invention, and desire to secure by Letters Patent, is-

1. In combination in an adj ustablecheck, an outer shell having a perforated head, an inner shell mounted in said outer shell and having a perforated head, a shoulder formed upon said inner shell, a plurality of openings below said shoulder and means for adjusting the position of said shoulder relatively to lthe head' of said outer shell, substantially as described.

2. In combination, forming an adjustable check, an inner and an outer shell, means for vertical adjustment of said shells relatively to each other, an aperture in the head of the outer shell, an aperture in the head of the inner shell, the aperture of the inner being smaller than and concentric with the aperl ture of the outer shell, a shoulder on the inner shell and a plurality of openings in the inner shell below said shoulder, substantially as described.

3. In combination in an adjustable check, an outer thimble-shaped shell provided with an aperture at its apex an inner cylindrical shell mounted in said outer shell and provided with an aperture at its apex, said aperture being smaller than and concentric with the aperture in the outer shell, a shoulder formed upon the head of the inner shell, a plurality of openings in the head of said inner shell below said shoulder, and means for lowering or raising said outer shell relatively to the inner, whereby said shoulder may be Withdrawn from or brought into contact with the inner surface of the head of said outer shell, substantially as described. 4

In testimony whereof I have signed my` name to this specification in the presence of two subscribing witnesses.

HENRY C. DANFORTH. vIVitnesses:

ANDREW W. CRAWFORD, ARTHUR E. NITZsoHE. 

